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OTHER COMPREHENSIVE INCOME (LOSS) Components of Other Comprehensive Income (Loss) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended |  |  |  |
--- | --- | --- | --- | --- | --- | ---
Jun. 30, 2025 | Jun. 30, 2024 | Jun. 30, 2025 | Jun. 30, 2024 | Mar. 31, 2025 | Dec. 31, 2024 | Mar. 31, 2024 | Dec. 31, 2023
AFS Debt Securities: |  |  |  |  |  |  |  |
Unrealized holding gains, pre-tax amount | $ 5,169 | $ (282) | $ 22,407 | $ (6,840) |  |  |  |
Unrealized holdings gains, tax (expense) benefit | (1,178) | 61 | (5,153) | 1,471 |  |  |  |
Unrealized holdings gains, after-tax amount | 3,991 | (221) |  |  |  |  |  |
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, pre-tax amount | (1,682) | (1,618) | (3,206) | (3,147) |  |  |  |
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, tax (expense) benefit | 384 | 348 | 769 | 677 |  |  |  |
Less: reclassification adjustment for amortization of securities transferred from AFS to HTM, after-tax amount | (1,298) | (1,270) |  |  |  |  |  |
Net unrealized gains, pre-tax amount | 6,851 | 1,336 | 25,613 | (3,693) |  |  |  |
Net unrealized gains, tax (expense) benefit | (1,562) | (287) | (5,922) | 794 |  |  |  |
Net unrealized gains, after-tax amount | 5,289 | 1,049 | 19,691 | (2,899) |  |  |  |
Cash Flow Hedges: |  |  |  |  |  |  |  |
Net decrease in fair value, pre-tax amount | (374) | 1,148 | (2,234) | 4,290 |  |  |  |
Net decrease in fair value, tax (expense) benefit | 85 | (247) | 509 | (923) |  |  |  |
Other Comprehensive Income (Loss), Cash Flow Hedge, Gain (Loss), before Reclassification, after Tax | (289) | 901 |  |  |  |  |  |
Less: effective portion reclassified into interest expense, after-tax amount |  |  |  | (1,316) |  |  |  |
Net decrease in fair value, pre-tax amount | (1,176) | 943 | (3,773) | 4,116 |  |  |  |
Net decrease in fair value, tax (expense) benefit | 268 | (203) | 860 | (885) |  |  |  |
Net decrease in fair value, after-tax amount | (908) | 740 | (2,913) | 3,231 |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Net gain on postretirement plans, pre-tax amount | (7) | (7) | (14) | (14) |  |  |  |
Net gain on postretirement plans, tax (expense) benefit | 2 | 2 | 3 | 3 |  |  |  |
Net gain on postretirement plans, net of tax | (5) | (5) | (11) | (11) |  |  |  |
Other comprehensive income, pre-tax amount | 5,668 | 2,272 | 21,826 | 409 |  |  |  |
Other comprehensive income, tax (expense) benefit | (1,292) | (488) | (5,059) | (88) |  |  |  |
Other comprehensive income | 4,376 | 1,784 | 16,767 | 321 |  |  |  |
Less: Amounts reclassified from AOCI | 674 | 1,104 | 1,238 | 2,323 |  |  |  |
Other comprehensive income (loss) before reclassifications | 3,702 | 680 | 15,529 | (2,002) |  |  |  |
Stockholders' Equity Attributable to Parent | 652,148 | 508,286 | 652,148 | 508,286 | $ 640,054 | $ 531,231 | $ 501,577 | $ 495,064
Net Unrealized Gains (Losses) on Cash Flow Hedges(1) |  |  |  |  |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Other comprehensive income | (908) | 740 | (2,913) | 3,231 |  |  |  |
Less: Amounts reclassified from AOCI | (619) | (161) |  | (136) |  |  |  |
Other comprehensive income (loss) before reclassifications | (289) | 901 | (1,725) | 3,367 |  |  |  |
Stockholders' Equity Attributable to Parent | 6,045 | 9,327 | 6,045 | 9,327 | 6,953 | 8,958 | 8,587 | 6,096
Net Unrealized Gains (Losses) on Debt Securities(1) |  |  |  |  |  |  |  |
AFS Debt Securities: |  |  |  |  |  |  |  |
Unrealized holdings gains, after-tax amount |  |  | 17,254 | (5,369) |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Other comprehensive income | 5,289 | 1,049 | 19,691 | (2,899) |  |  |  |
Less: Amounts reclassified from AOCI | 1,298 | 1,270 | 2,437 | 2,470 |  |  |  |
Other comprehensive income (loss) before reclassifications | 3,991 | (221) |  | (5,369) |  |  |  |
Stockholders' Equity Attributable to Parent | (84,324) | (110,308) | (84,324) | (110,308) | (89,613) | (104,015) | (111,357) | (107,409)
Defined Benefit Postretirement Plans(1) |  |  |  |  |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Other comprehensive income | (5) | (5) | (11) | (11) |  |  |  |
Less: Amounts reclassified from AOCI | (5) | (5) | (11) | (11) |  |  |  |
Other comprehensive income (loss) before reclassifications | 0 | 0 | 0 | 0 |  |  |  |
Stockholders' Equity Attributable to Parent | 400 | (250) | 400 | (250) | 405 | 411 | (245) | (239)
Accumulated Other Comprehensive Income (Loss) |  |  |  |  |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Stockholders' Equity Attributable to Parent | (77,879) | (101,231) | (77,879) | (101,231) | $ (82,255) | $ (94,646) | $ (103,015) | $ (101,552)
Interest Expense, Borrowings |  |  |  |  |  |  |  |
Cash Flow Hedges: |  |  |  |  |  |  |  |
Less: effective portion reclassified into interest expense, pre-tax amount | 802 | 945 | 1,539 | 1,850 |  |  |  |
Less: effective portion reclassified into interest expense, tax (expense) benefit | (183) | (203) | (351) | (398) |  |  |  |
Less: effective portion reclassified into interest expense, after-tax amount | 619 | 742 |  |  |  |  |  |
Postretirement Plans: |  |  |  |  |  |  |  |
Less: Amounts reclassified from AOCI |  |  | 1,188 | 1,452 |  |  |  |
Interest Income, Interest and Fees on Loans |  |  |  |  |  |  |  |
Cash Flow Hedges: |  |  |  |  |  |  |  |
Less: effective portion reclassified into interest expense, pre-tax amount | 0 | (740) | 0 | (1,676) |  |  |  |
Less: effective portion reclassified into interest expense, tax (expense) benefit | 0 | 159 | 0 | $ 360 |  |  |  |
Less: effective portion reclassified into interest expense, after-tax amount | $ 0 | $ (581) | $ 0 |  |  |  |  |

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